Circulating oil system for presses



June 20, 1950 P. H. DANLY ET AL 2,511,972

CIRCULATING on. SYSTEM FOR PRESSES Filed Nov. 5, 1947 5 Shee'ts-Sheet 1 INVENTORS PHILO H. mvLY GEORGE I. Dq/vu/ VHS/L GeQRGEFF QTTORNEY June 20, 1950 P. H. DANLY El'AL 2,511,972

CIRCULATING OIL SYSTEM FOR PRESSES Filed Nov. 3, 1947 5 Sheets-Sheet 2 )NVENTbRS 48 PH/Lo H. DANLY GEORGE I. DIQNLY F5 2 BY $55? June 20, 1950 P. H. DANLY ETAL 2,511,972

CIRCULATING OIL SYSTEM FOR PRESSES Filed Nov. 3, 194'? 5 Sheets-Sheet 5 INVENTORS PH/LO H. Dn/vLY GEORGE I DflNLY Wis/L GEORGEFF HTTORNE Y June 20, 1950 P. H. DANLY ETAL 2,511,972

CIRCULATING OIL SYSTEM FOR PRESSES Filed Nov. 5, 1947 S SheetS-Sheet 4 {I 2% 48 i 4 1 1 I I 1:. 1 i 73 7/ v i 52 z i v E I l 65 l i I 6 77 Xx I 63 fi E :2 I

TToRA/EY June 20, 1950 P. H. DANLY ETAL 2,511,972

CIRCULATING OIL SYSTEM FOR PRESSES Filed Nov. 3, 1947' 5 Sheets-Sheet 5 INVENTORS VPH/LO H. DAM/LY GEORGE .2. DAN

BY Vacs/L CiEORi-FFTF Patented June 20, 1950 CIRCULATING OIL SYSTEM FOR PRE'SSES Philo H. Danly, Hinsdale, George I. Danly, Elm.-

hurst, and Vasil Georgeff, Chicago, 111., assignors to Danly Machine Specialties, Inc., Chicago, 111., a corporation of Illinois Application November 3, 1947, Serial No. 783,748

12 Claims. 1 Our invention relates to a circulating oil system for presses, and more particularly to an improved lubricating system for power presses.

Power presses are employed for forming or shaping metal and .irequently form part of pro-v They are expensive pieces of d-uction lines. equipment and it is desirable to lengthen their life by proper lubrication. Furthermore, if a breakdown occurs in a power press forming part a production (line; the interruption of the entire l-ine represents"aconsiderable economic loss.

The power presses of the prior art have been provided -w-ith individual lubricating means for "various parts to be lubricated. The gears of the :accomm'odate-diflering dies .and work of different thicknesses 'is .varied, .rand for the bearings of different-sh'atts. .Elfhese lubricating means .are afre- -quently neglected (and inadvertently .allowed to run dry with "the result .that inadequate lubrica- @tion :frequently exists in .the .power presses of the prior art.

=ne object of -.our invention is. to provide a a common z-lubricating-system .-f or .all moving parts.

Anothenobiectof our.-invention.is .to providea lubricating system -.for ;power presses in which the movingnarts are positively .andtcontinuously supplied twith'a lubricating medium.

.Another object .of our invention .is to provide a continuous -circulating system :in which the vlubricant from (a central source .is circulated to all-moving parts, :returned to .the .source, .filtered and recirculated.

.Anotherobject :of our inventionis .to providea eontinuouselubricating system in which danger of thesprayingcotoileoverthe worker the operator of the press is avoided.

.Another and further .object got .our invention will appear Ltrom the following description.

. Fig'. lris' a. diagrammatic perspective -ViBW showing a.por.tion.of, our. lubricating system.

sFig. e2 is .a diagrammatic view showing an elexvationof the improved lubricating system shown in Fig. .1. 1

.Fig. .3 .is .a plan view. of .thesystem shown .in

.Fig. .1.

Fig. 4 is a fragmentary sectional elevation of apart of a power. press showing anotherjportion of our improved system.

Fig. 5"is a'fragm'entary elevation-withparts in section of the upper portion of a sliding joint used in our improved system.

,Fig. 6 is a view .similarto Fig. ,4 showing the lower portion of thesliding joint.

Fig. 7 is an end viewer" thevoil filter assembly usedinour invention.

Fig.- 8 is a SEOtiOHSJlw-YgiQW taken-0n th line 8 8 of Fig. '7.

In general, our invcntioncontemplate the pro.- vision of an oil sump .on the ram of the press which is driven to reciprocate by the pitmans which are actuated bythe eccentrics of the press. An oil distribution system provided for lubricating the gear trains, .the bearing shafts for the gears, the eccentric gear bearings, the pitman and the ram adjustment assembly. \Oi1;is continuously supplied to the oil distribution system by means of a pump rand .allowed to how newnwardly by grav ty irom "the crown of the press to the sump, whence it is filtered and recirculated. Since the oil reservoir is carried by a reciprocating part-and a Portion of the oil distribution system is mounted .on a stationary part of the press, a sliding oiletight :connectionis provided to furnish a conduit for the oil in a man- :ner to preclude the sliding connection from actof screws 22 through-adjusting members 24 which are rotated in unison'byfismotor -26 driving-shafts 28 .and30. An oil reservoir orsump 32 is-formed by a sheet metal housing F34. A motor 36 drives a pump 38 through shaf t 740, A filterassembly, indicated generally byithe-reference numeral 42, is provided for filterin the oi i the (reservoir '32. The pump 38 is "provided with an 'inlet pipe 44, connected to the filtenassembly, towhich oil is drawn through pipe 46 irom :the oil sump. The pump discharges .oil :through pipe 48 which is adapated to reciprocate with the press ram Hi. The pipe 48 passes Ythrougna stationary housing Ell of the sliding or itrombone joint of the oil distribution system.

is threadedly secured tothe fitting I52.

which meshes with right hand eccentric gear 16. The gear train shaft 62 carries a pinion 18 which meshes with a left hand eccentric gear 80. A second distribution pipe 82 communicates with the manifold 56 and supplies oil to the manifold 84. An outlet pipe 86 supplies oil to the rear bearing 88 of the right hand gear'train shaft 68. An outlet pipe 90 supplies oil from the manifold 84 to the rear bearing 92 for the left hand gear train shaft 62. A branch conduit 94 supplies oil to the rear bearing 96 of the flywheel shaft 98. Oil from the housing 52 passes through pipe I00, through pipe -l02 to the forward bearing I04 of the flywheel shaft 93. The flywheel shaft carries a pinion 106, which meshes with gear 1.2 so that both gears 12 and are driven from pinion I06. ,An outlet pipe I08, communicating with the pipe I00, provides oil to the gears 10, 12 and hence the pinion I06 meshing therewith. A branch pipe IIO, communicating with manifold 56, provides oil through outlet pipe I I2 to the right hand pitman. The branch pipe I I0 provides oil through outlet pipe H4 to the right hand eccentric gear bearing. Similarly, a distribution pipe II6 communicates with the manifold 56 and provides oil through outlet pipe H8 to the left hand pitman l4. An outlet pipe I provides oil to the lefthand eccentric gear bearing. A pipe I22 leads to a pressure gauge to indicate the oil pressure within the system.

A branch pipe I24, leading from the second -distribution pipe 82, furnishes oil to the eccenleft hand parts is deflected by deflection plate I28. The oil from the right hand part is defiected by a deflection plate I30. The oil flows downwardly through an opening I32 through which the pitman I2 passes. Similarly, the oil from the left hand side of the press flows through opening I34 through which the pitman passes. A collecting pan I36 is placed below the opening I32 and a collecting'pan I38 is placed below the opening I34. Thep'an-I36 is formed with an opening I40 through which oil may flow downwardly to lubricate the bearing between the lower end of the pitman and the pin I5. Oil may also flow downwardly to lubricate the adjusting member 24 and its friction surfaces, finally overflowing through pipe I42 back to the sump 32. In a similar manner, oil flows from the pan I38 to lubricate the parts within the left hand housing 20 for the ram adjustment mechanism. This oil flows through pipe I44 back to the sump. Excess oil from collecting pan I35 flows out of outlet I46 and excess oil from pan I38 flows out of outlet pipe I48. This oil is collected in the sump 32 for recirculation.

The filter assembly, which is indicated generally by the reference number 42, is shown in detail in Figs. '1 and 8. It comprises a housing I50, having an inlet fitting I52, provided with a seat I54 against which a'valve I56 is adapted to seal the inlet opening I56. The suction pipe 46 A filter cartridge I 60 is removably secured within the housing I50. Oil which passes through the filter I00 enters the manifold I62 with which the suctionpipe 44 communicates. After the filter has been in use for a time, -it may become clogged. When this occurs, the handle I64 is rotated to thus closing off the oil delivery pipe 46.

pipe 49 is closed with a cap 61.

in packing rings 13 and 15.

alignment with slots I66, permitting the spring I68 to seat the valve I56 on'the valve seat I54, Screws I10 are then unloosened and a filter I60 is removed through handle I12. The filter cartridge I60 is removed and replaced by a new filter assembly. When the cover plate I14 has been removed, the interior of the housing I50 may be cleaned of any sediment.

Referring now to Figs. 5 and 6, the oil pump 38 discharges through coupling 39 to the pipe 48 through a T connection 49. The lower end of the T is firmly secured to a base 5I. The pipe 48 projects upwardly through a flanged member 53 which is firmly secured to a stationary structural part of the press 55 by means of bolts 51. The housing 50 is threadedly secured to the upper end of the flanged member 53. The lower end of the flanged member is closed by a threaded plug 59 provided with sealing packing rings 6i and 63.

In Fig. 6, the position of parts is shown when the ram is at its lowermost position and about to begin its upward stroke. The pipe 48 is provided with holes 65, providing communication between the pipe 48 and the housing 50.

Referring now to Fig. 5, the upper end of the The upper end of housing 50 is provided with a T 69 threadedly secured thereto. The upper end of the T is closed with a plug 1I, provided with an opening through which the pipe 48 passes and with seal- The pipe 52 communicates with the T 69 by means of an elbow I1. In use, before the press is started, the motor 30 is energized, thus driving pump 38 and starting the oil circulation upwardly through pipe 48, housing 50 and the distribution system described above. The flywheel shaft bearings 96 and I04 are supplied with lubricant. This is true, too,

of the gear shaft bearings 88 and 66 and 92 and 60. The gears themselves are supplied with a stream of lubricant. The eccentric shaft bearing and the pitman bearings are likewise lubricated. Oil flows downwardly by gravity and lubricates .the ram adjusting mechanism. When the press is started. the ram will reciprocate, permitting the pipe 48 to slide in the housing 50. It will be observed that a continuous oil-tight packing is provided for the lubricating oil even though the pump and sump are carried upwardly and downwardly by the ram and the distributing system is on the stationary framework of the press. The oil is filtered and continuously circulated so that all of the friction surfaces are amply and plentifully supplied with a lubricating medium.

It will be seen that we have accomplished the objects of our invention. We have provided a common lubricating system for all the moving parts of a power press, by which these parts are positively and continuously supplied with lubricating oil. We have provided a continuous circulating system in which lubricating oil from the central source is circulated to all moving parts, returned to the source, filtered and recirculated. There is no danger of spraying the lubricating oil over the work or over the operator of the press, since the crown of the press adjacent the gears is completely enclosed. We have eliminated the plurality of the lubricating devices which, in the prior art, are subject to neglect and inattention, with the result that the press parts are always adequately lubricated.

We have shown our lubricating system applied to a press employing twin pitmans, byway of illustration and not by way of limitation. It is to be understood that our invention may be employed with other types of presses.

We have found that a pressure from twenty to twenty-five pounds per square inch will provide an ample flow of lubricant under the most arduous working conditions. Any suitable pressure may be employed. The oil pressure within the system is indicated by the pressure gauge 99 shown in Fig. 3. A variation of pressure may easily be achieved by regulating the speed at which the motor 36 which drives the pump is run. The oil pressure gauge, being readily visible to the operator, serves as a constant safety means to insure adequate lubrication of all of the press parts. Since the motor 36 will pump oil through the circulating system when the press is at rest, all the parts are adequately lubricated independently of whether or not the press is running.

It will be understood that certain features and sub-combinations are of utility and may be employed without reference to other features and sub-combinations. This is contemplated by and is within the scope of our claims. It is further obvious that various changes may be made in details within the scope of our claims without departing from the spirit of our invention. It is, therefore, to be understood that our invention is not to be limited to the specific details shown and described.

Having thus described our invention, what we claim is:

1. A power press, including in combination a frame, a ram adapted to reciprocate in said frame, drive mechanism carried by said frame adjacent the upper portion thereof, an oil reservoir carried by said ram, means for supplying oil from said reservoir to said drive mechanism and means for redirecting oil from the drive mechanism to the oil reservoir for recirculation.

2. A power press including in combination a frame having a crown, a ram adapted to reciprocate in said frame, drive mechanism positioned in said crown, said drive mechanism ineluding a drive shaft, bearings for said drive shaft, an oil reservoir carried by said ram, means for supplying oil from said reservoir to said drive shaft bearings and means for redirecting oil from the drive shaft bearings to the oil reservoir for recirculation.

3. A power press including in combination a frame having a. crown, a ram adapted to reciprocate in said frame, a, drive mechanism positioned in said crown, said drive mechanism including a drive shaft having a drive pinion and bearings, a power shaft havin a gear meshing with said pinion and having bearings, an oil reservoir mounted on said ram, means for supplying oil from saidreservoir to said bearings and means for redirecting oil from said bearings to said reservoir for recirculation.

4. A power press including in combination a frame having a crown, a ram adapted to reciprocate in said frame, drive mechanism positioned in said crown for reciprocating said ram, said drive mechanism including a pitman and an eccentric, an oil reservoir carried by said ram, means for supplying oil from said oil reservoir to said pitman and eccentric and means for redirecting oil from said pitman and eccentric to said reservoir for recirculation.

5. A power press including in combination a frame, a ram adapted to reciprocate in said frame, drive mechanism carried by said frame adjacent the upper portion thereof for reciproeating said ram, an oil reservoir carried by said ram, an oil pump carried by said ram, an oil conduit for supplying oil to said drive mechanism, said conduit including a flexible joint.

6. A power press as in claim 5 wherein said flexible joint comprises a stationary housing, a reciprocating pipe positioned in said housing and extending therethrough, means for packing the upper and lower portions of said housing around said movable pipe and means providing communication between said pipe and said housing within the housing.

7. A power press including in combination a frame having a crown, a ram carried by said frame for reciprocation therein, drive mechanism ositioned in said crown for reciprocating said ram, an oil reservoir carried by said ram, an oil pump having an inlet pipe communicating with said reservoir, a conduit for supplying oil discharged by said pump to said drive mechanism in said crown, said conduit including a flexible joint and bailies carried by said frame for redirecting oil supplied to said drive mechanism to said reservoir for recirculation.

8. A power press as in claim 7 including in combination a baflie carried by said ram, ramadjusting means for regulating the throw of said ram, said ram baiile being positioned to direct oil flowing downwardly from said drive mechanism to lubricate said ram-adjusting means.

9. A power press as in claim 7 including an oil filter interposed between said reservoir and said pump.

10. A power press as in claim '7 in which said flexible joint includes a stationary housing, a reciprocating pipe positioned in said housing and extending therethrough, means for packing said reciprocating pipe adjacent the upper and lower ends of the housing and means providing communication between the interior of said pipe and said housing within said housing.

11. A power press as in claim '7 in which the oil conduit includes an oil-distributing manifold positioned in said crown, said manifold having branch pipes for lubricating various portions of said drive mechanism.

12. A power press as in claim '7 in which the oil conduit includes an oil-distributing manifold positioned in said crown, said manifold having branch pipes for lubricating various portions of said drive mechanism, a, pressure gauge and a branch pipe providing communication between said manifold and said pressure gauge.

PHILO I-I. DANLY. GEORGE I. DANLY. VASIL GEORGEFF.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 567,339 Flagg Sept. 8, 1896 1,885,500 Williamson Nov. 1, 1932 2,209,938 Schauer July 30, 1940 FOREIGN PATENTS Number Name Date 6,913 Great Britain 1892 

